SortableJS
AutoScroll overflow:hidden demo not working
Problem:
The given demo does not work (Chrome 79, Mac OS Catalina): https://jsbin.com/xecihez/edit?html,js The list is not scrolling during a drag.
JSBin/JSFiddle demonstrating the problem:
https://jsbin.com/xecihez/edit?html,js,output
This looks like a bug. Even with overflow off, it still doesn't scroll when I believe it should.
We'll have to look into this further.
I've only narrowed it down to a change made in the 1.8.0 release. If you change the JS Bin example to use /1.7.0/ instead of /master/ in the script tag, autoscroll works again. /1.8.0/ and later break. Will try to look soon, but it looks like that was a large release.
~Possibly related to https://github.com/SortableJS/Sortable/issues/1373?~
Narrowed further to a change in commit 18cccbac11e2e050155878bc250fea6a6042d50f / PR #1386.
I've looked further into this, but I'm not close enough to this code to know what's going on anymore. Something with how the code since bubbleScroll was added handles finding and item's scroll-parent seems wonky, but I'm at a loss.
